Use constexpr TaskTraits constructor in content.

content/browser/frame_host/navigation_entry_screenshot_manager.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/frame_host/navigation_entry_screenshot_manager.h"
 
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/task_scheduler/post_task.h"
 #include "content/browser/frame_host/navigation_controller_impl.h"
@@ skipping 15 matching lines @@
 namespace content {
 
 // Encodes the A8 SkBitmap to grayscale PNG in a worker thread.
 class ScreenshotData : public base::RefCountedThreadSafe<ScreenshotData> {
  public:
   ScreenshotData() {
   }
 
   void EncodeScreenshot(const SkBitmap& bitmap, base::Closure callback) {
     base::PostTaskWithTraitsAndReply(
-        FROM_HERE, base::TaskTraits().WithShutdownBehavior(
-                       base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN),
+        FROM_HERE, {base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN},
         base::Bind(&ScreenshotData::EncodeOnWorker, this, bitmap), callback);
   }
 
   scoped_refptr<base::RefCountedBytes> data() const { return data_; }
 
  private:
   friend class base::RefCountedThreadSafe<ScreenshotData>;
   virtual ~ScreenshotData() {
   }
 
@@ skipping 193 matching lines @@
     NavigationEntryImpl* entry = owner_->GetEntryAtIndex(forward);
     if (ClearScreenshot(entry))
       --screenshot_count;
     ++forward;
   }
   CHECK_GE(screenshot_count, 0);
   CHECK_LE(screenshot_count, kMaxScreenshots);
 }
 
 }  // namespace content